diff --git a/Documentation/devicetree/bindings/sound/mediatek,mt8188-mt6359.yaml b/Documentation/devicetree/bindings/sound/mediatek,mt8188-mt6359.yaml
index 362e729b51b4..8c77e7f68ad7 100644
--- a/Documentation/devicetree/bindings/sound/mediatek,mt8188-mt6359.yaml
+++ b/Documentation/devicetree/bindings/sound/mediatek,mt8188-mt6359.yaml
@@ -62,6 +62,7 @@ patternProperties:
             - PCM1_BE
             - DL_SRC_BE
             - UL_SRC_BE
+            - DMIC_BE
 
       codec:
         description: Holds subnode which indicates codec dai.